Cite
Hot subdwarf stars in close-up view IV. Helium abundances and the $^3$He isotopic anomaly of subdwarf B star
MLA
Geier, S., et al. Hot Subdwarf Stars in Close-up View IV. Helium Abundances and the $^3$He Isotopic Anomaly of Subdwarf B Star. 2013. EBSCOhost, https://doi.org/10.1051/0004-6361/201322057.
APA
Geier, S., Heber, U., Edelmann, H., Morales-Rueda, L., Kilkenny, D., O’Donoghue, D., Marsh, T. R., & Copperwheat, C. (2013). Hot subdwarf stars in close-up view IV. Helium abundances and the $^3$He isotopic anomaly of subdwarf B star. https://doi.org/10.1051/0004-6361/201322057
Chicago
Geier, S., U. Heber, H. Edelmann, L. Morales-Rueda, D. Kilkenny, D. O’Donoghue, T. R. Marsh, and C. Copperwheat. 2013. “Hot Subdwarf Stars in Close-up View IV. Helium Abundances and the $^3$He Isotopic Anomaly of Subdwarf B Star.” doi:10.1051/0004-6361/201322057.